# Relationship history for MSHA mine 4403391

Current hierarchy: **SunCoke Energy Incorporated → Jewell Smokeless Coal Corporation → Coronet Jewell Preparation Plant #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Jewell Smokeless Coal Corp → Coronet Jewell Preparation Plant #1; 1950-01-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_mine:** B Ray  Thompson → Coronet Jewell Preparation Plant #1; 1950-01-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** B Ray  Thompson → Jewell Smokeless Coal Corp; 1950-01-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → Coronet Jewell Preparation Plant #1; 1979-10-17 to 2012-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Jewell Smokeless Coal Corporation → Coronet Jewell Preparation Plant #1; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Jewell Smokeless Coal Corporation; 1979-11-01 to 2012-01-16; source msha-controller-operator-history
- **controller_controls_mine:** SunCoke Energy Incorporated → Coronet Jewell Preparation Plant #1; 2012-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SunCoke Energy Incorporated → Jewell Smokeless Coal Corporation; 2012-01-17 to current/open; source msha-controller-operator-history